!971 Cuda stock Disc/drum, rebuilt original calipers. When take the car out cold, brakes are fine. After a bit of cruising, back home now, front brakes lock up(feels like E-brake is on, but isn't). Rears are okay(free wheeling).
What's going on? Where do I start. The master has been replaced also. Driving season is upon us, would like to sort this out. Help! Thank you!
Sorry for my first post being a problem.

 

I would suggest replacing the front and rear rubber hoses if not already done, one may be collapsing

 

 

Wrong master cylinder? Drum - Drum with residual valves in both outlets?

 

71 -

Do the easy stuff first. Make sure the wheel cylinders or the calibers aren't locking up with heat.

When the breaks start acting up, get home, pop the wheel and have someone pump the pedal.
See what the cylinder does.

Archer

 

Why not upgrade to a modern set of brakes? It would be safer.

 

Did you mix up the ft and rear on the master.

 

 

 

My guess would be to measure it at the booster with the bolts loose